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The lateral surface area of a cylinder


\begin{gathered} =2\pi rh \\ \text{from the given question radius =7ft and height= 21ft} \\ \pi=\text{ }(22)/(7) \\ \text{The lateral surface area of a cylinder =2}*(22)/(7)*7*21 \\ \text{The lateral surface area of a cylinder =923.63ft}^2 \end{gathered}

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